* Retrieves the afb_req stored at 'req' and frees the memory.
* Returns the stored request.
* The count of reference is UNCHANGED, thus, normally, the
* function 'afb_req_unref' should be called on the result
* after that the asynchronous reply if sent.
*/
* Retrieves the afb_req stored at 'req' and frees the memory.
* Returns the stored request.
* The count of reference is UNCHANGED, thus, normally, the
* function 'afb_req_unref' should be called on the result
* after that the asynchronous reply if sent.
*/